Connected: An Internet Encyclopedia
RFC 850

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RFC 850
June 1983

### Standard for Interchange of USENET Messages

Mark R. Horton

This memo is distributed as an RFC only to make this information easily accessible to researchers in the ARPA community. It does not specify an Internet standard.

#### Table of Contents

1. Introduction
2. Article Format

2.1 Required Headers

2.1.1 Relay-Version
2.1.2 Posting-Version
2.1.3 From
2.1.4 Date
2.1.5 Newsgroups
2.1.6 Subject
2.1.7 Message-ID
2.1.8 Path

2.2 Optional Headers

2.2.1 Reply-To
2.2.2 Sender
2.2.3 Followup-To
2.2.4 Date-Received
2.2.5 Expires
2.2.6 References
2.2.7 Control
2.2.8 Distribution
2.2.9 Organization

3. Control Messages

3.1 Cancel
3.2 Ihave/Sendme
3.3 Newgroup
3.4 Rmgroup
3.5 Sendsys
3.6 Senduuname
3.7 Version

4. Transmission Methods

4.1 Remote Execution
4.2 Transfer by Mail
4.3 Batching

5. The News Propagation Algorithm

Original text document

Next: 1. Introduction

Connected: An Internet Encyclopedia
RFC 850